Extremely difficult piano pieces #2 - Liszt's Feux Follets really needs no introduction. It's really tough! (In truth, Liszt has even more difficult pieces than this one.)
https://www.youtube.com/watch?v=LsggmCF1Cys
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Liszt: Transcendental Etude No.5, Feux Follets (Kissin)
The killer difficulty really comes after 29 seconds.